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According to the National Aeronautics and Space Administrations, the Atmosphere is divided in some major layers, which provide out existence. All of them differ in composition and in effects, so every one of them must receive a different usage.

First on the list is the atmosphere’s composition. Here, we have 78% nitrogen gas and 21% oxygen, so the remained 1 per cent goes to the composition of argon, carbon dioxide and ozone.
The first layer up to the Earth is the troposphere. Its grades vary between 60 degrees to minus 71 degrees Fahrenheit. Remember, this is only the first layer. Next we are glad to meet the second layer above the Earth, the Stratosphere which has a length of approximately 31 miles and a warmer temperature due to the existent ozone which absorbs the ultraviolet radiation. The third layer above the Earth is the Mesosphere indeed; this is a cold layer of minus 135 degrees of approximately 53 miles high and also the part where most meteors burn up because of the collide with the air particles.

The last but not the least, the higher layer above the Earth is by far the Thermosphere. In this layer, the air is very thin and it has a height of about 372 miles. Also, it has a heated temperature of about 3,000 grades Fahrenheit just because the radiation generalized by the Sun. This layer goes to outer space and is sometimes confused with it. Either way, all the forth layers have an imperative importance in our lives, defending us by meteors, ultraviolet radiations and high temperatures at which life could not exist on the Earth. An extraordinary video created with pictures that shows Earth can be found here: www.tvsecrets.net.

These facts are not based on simple square footage formulas but on complex calculations. However, you don’t need to be a rocket scientist in order to deduce the size of the universe compared to our planet, the Sun or even our galaxy. It is almost impossible to measure the universe’s dimension, at least for now. Maybe in the next years the population will be able to know the universe with all its mysteries, but it has a little probability. The technology did not reach that point and it is very probable not to reach it in the next two hundred years. Though, while our planet is being kept away from any hazard meteors or temperatures, we seem like we are having a blest. But for how many years the Earth will continue to support us? We need to understand what the universe expects from us for meeting its requirements.